Model the User data structure

[a-bakos]

A WP user object:

[x] = already implemented
---
string $nickname
string $description
string $user_description
[x] string $first_name
string $user_firstname
[x] string $last_name
string $user_lastname
[x] string $user_login
[x] string $user_pass
string $user_nicename
[x] string $user_email
string $user_url
string $user_registered
string $user_activation_key
string $user_status
int    $user_level
string $display_name
string $spam
string $deleted
string $locale
string $rich_editing
string $syntax_highlighting
string $use_ssl